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A Numerical and Experimental Study of Transient Heat Transfer in a Shell-and-Tube Latent Heat Storage Unit with Paraffin as a Phase Change Material

A physical process of transient heat transfer in the shell-and-tube latent heat storage unit has been analysed numerically and experimentally in this paper. Heat transfer considered in the paper is the conjugate problem of transient forced convection between heat transfer fluid and the wall, heat conduction through the wall and heat exchange of the phase change material. Governing dimensionless differential equations for heat transfer fluid, wall and phase change material with initial and boundary conditions have been discretised by a control volume approach and then solved by Fortran software using an iterative procedure. The numerical model is validated with experimental data. Commercial paraffin RUBITHERM RT 30 has been used in experimental investigations as a phase change material. Mutual agreement has been established between numerically and experimentally obtained timewise temperature variations. Unsteady temperature distributions of heat transfer fluid, wall and phase change material have been obtained by numerical calculations and thermal behaviour of latent heat storage unit during charging and discharging has been simulated.

transient heat transfer; latent heat storage unit; numerical analysis; experiment

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